source: ThirdParty/mpqc_open/src/bin/mpqc/sample/newton.in

% Emacs should use -*- KeyVal -*- mode
% molecule specification
molecule<Molecule>: (
  symmetry = c2v
  unit = angstrom
  { atoms geometry } = {
     O     [     0.00000000     0.00000000     0.36937294 ]
     H     [     0.78397590     0.00000000    -0.18468647 ]
     H     [    -0.78397590     0.00000000    -0.18468647 ]
  }
)
% basis set specification
basis<GaussianBasisSet>: (
  name = "3-21G"
  molecule = $:molecule
)
mpqc: (
  checkpoint = no
  savestate = no
  restart = no
  % molecular coordinates for optimization
  coor<SymmMolecularCoor>: (
    molecule = $:molecule
    generator<IntCoorGen>: (
      molecule = $:molecule
    )
  )
  do_energy = no
  do_gradient = no
  % method for computing the molecule's energy
  mole<CLHF>: (
    molecule = $:molecule
    basis = $:basis
    memory = 16000000
    coor = $..:coor
    guess_wavefunction<CLHF>: (
      molecule = $:molecule
      total_charge = 0
      basis<GaussianBasisSet>: (
        molecule = $:molecule
        name = "STO-3G"
      )
      memory = 16000000
    )
    hessian<FinDispMolecularHessian>: (
      only_totally_symmetric = yes
      eliminate_cubic_terms = no
      checkpoint = no
    )
  )
  optimize = yes
  % optimizer object for the molecular geometry
  opt<NewtonOpt>: (
    print_hessian = yes
    max_iterations = 20
    function = $..:mole
    convergence<MolEnergyConvergence>: (
      cartesian = yes
      energy = $..:..:mole
    )
  )
)